Convert rast to png

What is the difference between .rast and .png?

Description: The Sun Rasterfile, identified by the extension .rast, is a bitmap image file format originally developed for use on SunOS by Sun Microsystems. It is designed to store color and monochromatic raster images, such as scanned photographs and digital artwork. The format supports various color depths, including 1, 8, 24, and 32 bits per pixel, allowing for a range of color representations from simple black and white to full true color images. Despite its origins on Sun systems, the format can be used on various platforms and is supported by a variety of image editing and viewing software.; A PNG file is an image file stored in the Portable Network Graphic (PNG) format. It contains a bitmap of indexed colors and uses lossless compression, similar to a .GIF file but without copyright limitations. PNG files are commonly used to store graphics for web images.